Carburetor



July 19, 1927.

.1. M. KING CARBURETOR Filed Dec. 31. 1920 @ENTOR.

Patented July 19, 1927.

JOSEPH MARION KING, OF DETROIT, MICHIGAN.

CARBURETOR.

Application filed December 31, 1920. Serial No. 484,839.

This invention provides a carburetor for internal combustion engines, utilizing combustible fluids as their'motive medium, and isofnovel structure and method of operation. i

The primary purpose of the invention is the construction of a carburetor that will adequately vaporize kerosene and other heavier hydrocarbon fluids without submitting the fuel to the excessively high temperatures which are necessary in the devices now employed, thus enabling the cylinder to receive a heavier charge 0 alr, and preventing the cracking of the fuel molecule;

the latter as is Well known resulting in the formation of explosive gases, which cause knocks and undue strains to the engine. By

eliminating the high temperature the fuel enters the cylinder and is compressed without alteration of its molecular pattern and when ignition takes place an entirely different form ofburning takes place; instead of explosion at much slower process, combustion, is in evidence. As a consequence of obtaining a greater weight of air in the cylinder, there is a corresponding increase of power.

The invention contemplatesa carburetor of the type stated comprising a conduit having an inlet for air, an inlet for the explosion gases and an outlet to thefuel-intake passage of an engine; a plurahty of fuel supplies controlled by a lever, and a venturi, at t e middle portion of which, a fuel-exit to the air passage is formed; one end of the venturi communicates with the air passage while the other is connected exclusively with a passage that leads from the exhaust manifold or may lead from the engines cylinder direct. Each exhaust impulse, which passes hot gases through the venturi produces a very low pressure at the fuel-exit, wh ch raises the fuel and by reason of the high 'velocity and temperature of the gases, the 'fuel is ejected fromthe venturi into the air f'passage as a vapor.

The flow of fuel is lated by a commonneedle-valve.

he invention further contemplates means in the fuel-supplyreceptacles to facilitate suitable amounts of fuel for the varying degrees of engine-speed and enginedoad, comprising a receptacle communicating with a source of fuel supply and the fuel-exit of the venturi, .in which is arranged a liftingvalve, floated by a' cork or other suitable at the top of the receptacle and contiguous to the top of the cork or float and provided with a cover between which and the membrane atmospheric pressure may obtain. As thus arranged it will be observed, the flow of fuel to the receptacle from' the source" of supply will correspond to orbe indirectproportion to the velocity'of the explosion gases passing through the venturi and as the velocity of such gases vary as the engine speed or as the quantity of the explosive charge, that is under load, the supply to the receptacle will correspondingly vary.

I Referring to the drawings, forming a part of the specification,

Figure 1 is a lateral elevation, partlyin section of a carburetor embodying the invention. Figure 2 is a longitudinal elevation partly in section on the-line A-A of Fig. 1; Fig. 1 being in section on the line B-B of Fig. 2.

Corresponding and like parts are referred PATENT 0FFICE.L

to in the following description and indicated in the drawings by the samereferencenumerals:

3 is an annular conduit, provided with a smaller and similar conduit 4: at one of its ends adapted to connect with a passage, not

for the fuel-intake passage to an engine';-6

is an annular conduitforming an air passage to conduit 3; 7 is a fuel receptacle, designated G for gasoline, which is used for primarily starting an engine; 8 is a fuel receptacle designated K for kerosene, which is purposed to be used immediately after the engine is put in motion; 9 is receptaclevalve; 10 is receptacle-floatand 11 is. receptacle-membrane while 12 is 'passage-wa leading from the fuel. reseptaclezto the fue source, not shown; 13 is the fuel passageway leading from the fuel receptacle by ball-valve 14 to nozzle 15 and thence. to a venturi 16 which is concentrically mounted in conduit 3, one end communicating exclusively with conduit 4 while its other, end opens to conduit 5; 17 is a fuel-regulating or setting-valve and by screw-way is adapted to turn in a cylinder 18, whose lower end is provided with a cam member 19 that effects the opening to the fuel receptacles by pressing away from their seats ball valve 14; a suitable member 20 which incloses cylinder 18 is mounted in air-tightrelation by means of screw-threads, on a portion 22 formed on the top side of conduit 3; 23 is a bearing member for cylinder 18 and has attached thereto a lever 24, the movement of which is adapted to change the flow of the fuels; 25 is a packing member for the nee'dlevalve 17; 26 is a helical springwhich holds ball valve 14 with yielding resistance against its seat 27 28 is a choke-valve used for starting an engine; 29 is a, helical spring surrounding cylinder 18 and adapted to press firmly against an annular bearing 30 rigidly mounted on cylinder 18 and also against member 20 so that the bearing member 23 will be held tightly against member 20; 31 is a throttling valve and 32 its lever; 33 is the fuel-exit of the venturi 16, communicable with fuel-nozzle 15 and the fuel passage 18. When a low pressure occurs in the venturi the same is extended to the interior of the fuel receptacles and causes the atmospheric pressure to press against the membrane 11 which in turn presses downward the floats 10 and thereby opens valves 9 which. admit fuel to the receptacles.

When associated with an engine in the usual mannerand a passageway from the exhaust manifold to the exhaust-intake connection of the carburetor is provided, the operation is as follows :-The choke-valve of the carburetor is closed, thus completely closing the air-intake and the engine-shaft is rotated for starting. The air is now drawn through the venturi from the exhaust manifold, and the orifice of ingressbeing comparatively small, avery low pressure is thereby established over the fuel -exit ofthe venturi and consequently a heavy charge of gasoline is atomized and drawn into the cylinder; the engine now starts and each succeeding exhaust-impulse draws into the venturi fuel and ejects it into the air-passage in the form of vapor; the needle-valve being adjusted, the fuel-change lever 24 is moved ninety degrees, which cuts out the gasoline and introduces the kerosene.

It is obvious that changes in design may be made from that shown by the drawings and described in the specification without departing from the essence of the invention stated in the appended claims.

I claim,

1. A carbureting device for internal combustion engines comprising an outer and an inner'conduit, a fuel source and a throttling valve, the outer conduit having an air inlet and a fuel-mixture outlet, the inner conduit having an, exhaust-gases inlet, a fuel inlet, a fuel-exhaust-gases outlet and therein a venturi adapted to cause the flow and I duit communicable with an engines exhaust metering thereof of fuel from the said fuel source to the said fuel-mixture outlet when subjected to the influx of exhaust gases.

2. A carbureting device for internal combustion engines comprising an outer andan inner conduit, fuel receptacles, a throttling valve and a fuel needle-valve, the outer conduit having an airinlet and a fuel-mixture outlet, the inner conduit having an exhaustgases inlet communicable with the interior of an engines exhaust manifold, a fuel inlet, a fuel-exhaust-gases outlet and therein a venturi adapted to cause the flow and metering thereof of unlike fuels from the a said fuel receptacles to the interior of the said inner conduit and thence to the said fuel-mixture outlet when the said venturi is subjected to the influx of exhaust gases. 1

3. A carbureting device for-internal com- I bustion engines comprising an outer and. an inner conduit, fuel receptacles. and a throttling valve, the outer conduit having an air inlet and a fuel-mixture outlet, the inner conduit having an exhaust-gases inlet communicable with the interior of an engines exhaust manifold, a fuel inlet, a fuel-exhaustgases outlet, a venturi provided in the said inner conduit and adapted to cause the flow and metering thereof of fuel from the 7 said fuel receptacles to the interior of the said inner conduit and thence to the said fuel-mixture outlet when the said venturi is subjected to the intermittent. influx of exhaust gases and means to alternate/the flow of unlik fuels. 7

4. A carbureting device for internal conibustion engines comprising an outer. conduit having an air inlet and a fuel-mixture outlet and an inner conduit approximately a concentric therewith having an inlet comvmunicable with the interior of an engines exhaust manifold and an outlet tothe said fuel-mixture outlet, the efiluent end of the outer conduit adapted to engage an engines intake manifold, receptacles for unlike fuels and means to alternate the flow thereof," a. throttling valve and a venturi provided in the said inner conduit and adapted to cause the flow and metering thereof of fuel to the said fuel-mixture outlet when the said venturi is subjected to the intermittent influx of exhaust gases. r 5. A carbureting device for internal coinbustion engines in which 1s provided acoumanifold, a plurality of fuel receptacles equipped with fuel valves controlled by diaphra ms and means in said conduit'tofactw ate the said diaphragms and cause the flow of fuel from the said receptacles to the intake passage of an engine when the said conduit is subjected to the influx of exhaust gases. p e

6. In a carburetor, com rising .a conduit having an air inlet, an exp osion-gases inlet,

a fuel-mixture outlet, fuel receptacles, a throttling valve, a fuel valve to alternate the flow of difierent kinds of fuel, a conduitmember provided with a fuel inlet and communicable with the said explosion-gases inlet and the said fuel-mixture outlet, fuelcontrol diaphragms mounted in said fuel receptacles provided with valves which admit fuel to the said fuel receptacles from a fuel source, a fuel passage leading from said fuel receptacles to the fuel inlet of said conduit-member and means in said conduit member, whereby explosion gases are adapted to cause varylng low air pressures against the said fuel-control diaphra ms to admit fuel from a fuel source to said fuel receptacles, thence to the said conduit-member to be ejected into the said fuel-mixture outlet communicating with an engines intake port.

In testimony whereof I aflix my signature.

JOSEPH MARION KING. 

